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Grok Code Fast 1 vs Gemini 2.5 Pro Preview 06-05

Compare Grok Code Fast 1 by xAI against Gemini 2.5 Pro Preview 06-05 by Google AI, in 3 community votes, gemini 2.5 pro preview 06-05 wins 100% of head-to-head duels, context windows of 256K vs 1.0M, tested across 38 shared challenges. Updated April 2026.

Which is better, Grok Code Fast 1 or Gemini 2.5 Pro Preview 06-05?

Gemini 2.5 Pro Preview 06-05 is the better choice overall, winning 100% of 3 blind community votes on Rival. Grok Code Fast 1 costs $0.2/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05. Context windows: 256K vs 1049K tokens. Compare their real outputs side by side below.

Key Differences Between Grok Code Fast 1 and Gemini 2.5 Pro Preview 06-05

Grok Code Fast 1 is made by xai while Gemini 2.5 Pro Preview 06-05 is from google. Grok Code Fast 1 has a 256K token context window compared to Gemini 2.5 Pro Preview 06-05's 1049K. On pricing, Grok Code Fast 1 costs $0.2/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05. In community voting, In 3 community votes, Gemini 2.5 Pro Preview 06-05 wins 100% of head-to-head duels.

In 3 community votes, Gemini 2.5 Pro Preview 06-05 wins 100% of head-to-head duels. Gemini 2.5 Pro Preview 06-05 leads in Reasoning. Based on blind community voting from the Rival open dataset of 3+ human preference judgments for this pair.

Reasoning: Gemini 2.5 Pro Preview 06-05 wins 100% of votes
Our Verdict
Gemini 2.5 Pro Preview 06-05
Gemini 2.5 Pro Preview 06-05Winner
Grok Code Fast 1
Grok Code Fast 1Runner-up

Pick Gemini 2.5 Pro Preview 06-05. In 3 blind votes, Gemini 2.5 Pro Preview 06-05 wins 100% of the time. That's not luck.

Gemini 2.5 Pro Preview 06-05 particularly excels in Reasoning. Grok Code Fast 1 is 6.7x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
99%

Grok Code Fast 1 uses 6.0x more emoji

Grok Code Fast 1
Gemini 2.5 Pro Preview 06-05
60%Vocabulary51%
17wSentence Length15w
0.97Hedging0.31
2.8Bold4.8
2.5Lists4.1
0.06Emoji0.00
0.89Headings0.98
0.11Transitions0.05
Based on 23 + 20 text responses
vs

Ask them anything yourself

Grok Code Fast 1Gemini 2.5 Pro Preview 06-05

Some models write identically. You are paying for the brand.

178 models fingerprinted across 32 writing dimensions. Free research.

Model Similarity Index

185x

price gap between models that write identically

178

models

12

clone pairs

32

dimensions

Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%
Read the full reportor download the 14-slide PDF

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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